For best results with German roaches in any treatment situation.... if they
persist past three months is to rotate products with different active
ingredients quarterly to break the cycle and prevent pesticide resistance
(baits or sprays). This is why some restaurants always have them as their
providers do not do this and it needs to be specifically requested and
monitored that they are doing such. JTV
Joel Voron Colonial Williamsburg Foundation
Integrated Pest Management Program Manager
Conservation Dept.
Office 757-220-7080
Cell 757-634-1175
E-Mail [email protected]
________________________________________
From: [email protected] <[email protected]> on behalf of Y.
Kondo <[email protected]>
Sent: Friday, May 22, 2026 6:21 AM
To: [email protected]
Subject: Re: [PestList] Cockroach
[CAUTION: This message originated from outside the Foundation. Do not click
links, open attachments or take action unless you know the contents are safe]
Hi David
Thank you so much for your quick reply.
Ok. I can suggest them Advion gel bits.
I also hope that they definitely understand that they should not eat there or
nearby.
Best wishes
Yoshiko
Yoshiko Kondo
BOOK PAPER & PHOTOGRAPH CONSERVATION
Studio: c/o Vecchio Conventino
Via Giano della Bella 20
50124 Firenze Italy
Instagram: @karta.conventino
2026年5月22日(金) 11:45 David Loughlin
<[email protected]<mailto:[email protected]>>:
Hi Yoshiko
Yes, German Cockroach, Blattella germanica. Best treated by a professional.
There are plenty of good gel baits available now to treat cockroaches in their
harbourages e.g. Maxforce, Advion brands. Several registered as approved EU
Biocides. Make sure your professional uses one of those rather than sprays or
powders. Also make sure all food is removed from the affected area.
Regards
David
Historyonics
From: <[email protected]<mailto:[email protected]>> on behalf
of "Y. Kondo"
<[email protected]<mailto:[email protected]>>
Reply to: <[email protected]<mailto:[email protected]>>
Date: Friday 22 May 2026 at 10:40
To: <[email protected]<mailto:[email protected]>>
Subject: [PestList] Cockroach
Hi everyone
May I ask for confirmation?
Are they German cockroaches?
They found them in a trap inside a metal drawer containing cardboards and
archival paper.
First of all, it's housekeeping, right?
What about future treatments?
I would appreciate your advices.
Thanks a lot.
Yoshiko
Yoshiko Kondo
BOOK PAPER & PHOTOGRAPH CONSERVATION
Studio: c/o Vecchio Conventino
Via Giano della Bella 20
50124 Firenze Italy
Instagram: @karta.conventino
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